Biology: Life on Earth (11th Edition)
11th Edition
ISBN: 9780134256283
Author: Audesirk
Publisher: PEARSON
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Textbook Question
Chapter 10, Problem 3MC
During crossing over,
a. chromatids of homologous chromosomes exchange parts.
b. mutations occur with higher than average frequency.
c. chromatids of nonhomologous chromosomes exchange parts.
d. nondisjunction occurs.
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Students have asked these similar questions
Crossing over usually contributes to genetic variation by exchanging chromosomal segments between:
A.
nonhomologous loci of the genome (E) autosomes and sex chromosomes.
B.
chromatids of nonhomologous chromosomes
C.
non-sister chromatids of homologous chromosomes
D.
sister chromatids of a chromosome
E.
polyploid chromosomes
Translocations occurs between
A) homologous chromosomes
B) Nonhomologous chromosomes
C) homologous chromatids
D) all of these
What is the fundamental difference between mitosis and meiosis?
A.
DNA is replicated twice in meiosis, but only once in mitosis.
B.
The number of DNA molecules per cell nucleus is cut in half in meiosis but remains constant in mitosis.
C.
The number of chromosomes doubles in meiosis, whereas it stays the same in mitosis.
D.
Mitosis involves two cell divisions, whereas meiosis only involves one.
Chapter 10 Solutions
Biology: Life on Earth (11th Edition)
Ch. 10 - Pairs of chromosomes with almost identical genetic...Ch. 10 - A cell with three or more copies of each...Ch. 10 - During crossing over, a. chromatids of homologous...Ch. 10 - Which of the following does not contribute to...Ch. 10 - Haploid nuclei are first formed at what stage of...Ch. 10 - 1. Meiotic cell division produces _______ (how...Ch. 10 - During _______ of meiosis I, homologous...Ch. 10 - Prob. 3FTBCh. 10 - Prob. 4FTBCh. 10 - Women with __________ syndrome have a single X...
Ch. 10 - Prob. 1RQCh. 10 - 2. Describe crossing over. At which stage of...Ch. 10 - 3. In what ways are mitosis and meiosis similar?...Ch. 10 - 4. Diagram and describe the three main types of...Ch. 10 - Describe how meiosis provides for genetic...Ch. 10 - Define nondisjunction, and describe common...Ch. 10 - 1. Many plants can reproduce sexually or...
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- Which of the following statements about homologous chromosomes is accurate? Select all that apply. A.)They are the same as sister chromatids. B.) They are genetically identical. C.) They pair during mitosis. D.) They pair during meiosis. E.) They are genetically similar.arrow_forwardAn error occurred during meiotic cell division, and a human egg has an extra copy of chromosome 21. That egg was fertilized by a normal sperm to create an embryo. This would lead to an individual A) who was tetraploid B) who would be normal in chromosomal number C) who had trisomy D) who was triploidarrow_forwardA) Give the diploid number of this organism. B) Is it mitosis or meiosis? Give two (2) elements on which you base your reasoning. C) Identify this mystery phase of the cell cycle. D) How many daughter cells will be produced at the end of the process and how many chromosomes (in numbers) will they contain? E) How does this process ensure the genetic variability of individuals of the species? Your answer must be based on two (2) different elements.arrow_forward
- When does crossing over usually occur, and what is the endresult?a. It occurs during prophase of meiosis I, and the end result isthe exchange of pieces between homologouschromosomes.b. It occurs during prometaphase of meiosis I, and the endresult is the exchange of pieces between homologouschromosomes.c. It occurs during prophase of meiosis I, and the end result isthe separation of sister chromatids.d. It occurs during prometaphase of meiosis I, and the endresult is the separation of sister chromatids.arrow_forwardCrossing-overa. results in genetic recombination between nonhomologous chromosomes.b. results in genetic recombination between sister chromatids.c. occurs only between members of a tetrad.d. occurs between adjacent tetrads.arrow_forwardA) At the end of meiosis I, how many chromosomes are in each cell? B) Are the cells haploid or diploid? C) Are the chromosomes of the meiosis I products replicated or nonreplicated? D) During which phase in meiosis I would crossing over have occurred?arrow_forward
- If sisiter chromatids of one daughter cell from meiosis l failed to separate during meiosis ll, what would the resulting gametes look like? a. 2 gametes will have 2 of the effected chromosomes, and 2 gametes will have 0 of the effected chromosomes. b. non of the gametes will have any of the effected chromosome. c. 2 gametes will be normal, 1 garmete will have 2 of the effected chromosoms, and 1 gamete will have 0 of the effected chromosome. d. 2 gametes will be normal, and 2 gametes will have 2 of the effected chromosome. e. 2 gametes will be normal, and 2 gametes will have 0 of the effected chormosomearrow_forwardWhich statement about homologous chromosomes is FALSE? Select one: a. They contain the same genes in the same places along the length of the chromosome b. One member of the homologous pair came from your mother, the other from your father c. For a particular gene, one member of the pair may have one allele, while the other has a different allele d. They are joined together at the centromere as the two halves of the typical X-shaped chromosomearrow_forwarda) In which stage of mitosis do chromosomes condense? (b) If a eukaryotic organism has a total of 34 chromosomes, how many pairs will the chromosomes be arranged in? (c) Define homologous chromosomes.arrow_forward
- A diploid organism produces four gametes from one parent cell through the process of meiosis. Two gametes are found to have 7 chromosomes and two gametes are found to have 5 chromosomes. A) Is this the expected number of chromosomes that would be found in each gamete following a normal cycle of meiosis? If yes, explain why. If no, explain why not and describe how the gamete situation described above occurred. B) Determine the number of homologous chromosome pairs that the original parent cell contained, before meiosis began. Explain how you determined this value.arrow_forwardSketch a series of diagrams showing each of the following, making sure to end each series with haploid cells:(a) How a pair of alleles for a single locus segregate in meiosis(b) How the alleles of two unlinked loci assort independently in meiosis(c) How the alleles of two linked loci undergo genetic recombinationarrow_forwardThese items separate from each other during anaphase 2 of meiosis. a. Sister chromatids b. Homologous chromosome c. Genes d. The two parts of a cellarrow_forward
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